Gerrikins
(noun) a demon who is good with numbers and matrices, but has no people skills and very little patience. He is constantly forcing himself between you and your clients so that you won't be bothered. He really wants to help, but sometimes he's not the best solution to a problem. Most small businesses will at some point have a gerrikins.
Gerrikins really helped my business financially, but my clients didn't like having to interface with him.